Hi,
We are trying to port our application to Xenomai 3.2.
The source is c++ and we use in some parts C++11 elements. Therefore the
compile switch is set to -std=c++11.
When now compiling with this option we see following output when using Xenomai
3.2:
In file included from
/home/delphi/sw/oss/IntelliVue-OSS-R18-FEATUREBUILD-5.4-Kernel-88/sdk-iv-monitor/target-sysroot/usr/xenomai/include/cobalt/semaphore.h:24,
from
/home/delphi/sw/oss/IntelliVue-OSS-R18-FEATUREBUILD-5.4-Kernel-88/sdk-iv-monitor/target-sysroot/usr/xenomai/include/cobalt/sys/cobalt.h:25,
from
/home/delphi/sw/oss/IntelliVue-OSS-R18-FEATUREBUILD-5.4-Kernel-88/sdk-iv-monitor/target-sysroot/usr/xenomai/include/copperplate/clockobj.h:113,
from
/home/delphi/sw/oss/IntelliVue-OSS-R18-FEATUREBUILD-5.4-Kernel-88/sdk-iv-monitor/target-sysroot/usr/xenomai/include/alchemy/timer.h:22,
from
/home/delphi/sw/oss/IntelliVue-OSS-R18-FEATUREBUILD-5.4-Kernel-88/sdk-iv-monitor/target-sysroot/usr/xenomai/include/alchemy/heap.h:22,
from ../PROG/Test.cpp:39:
/target-sysroot/usr/xenomai/include/cobalt/uapi/kernel/urw.h: In function 'void
__try_read_start(const urw_t*, urwstate_t*)':
/target-sysroot/usr/xenomai/include/cobalt/uapi/kernel/urw.h:57:19: error:
expected primary-expression before 'volatile'
#define READ_ONCE ACCESS_ONCE
^~~~~~~~~~~
/target-sysroot/usr/xenomai/include/cobalt/uapi/kernel/urw.h:64:10: note: in
expansion of macro 'READ_ONCE'
token = READ_ONCE(urw->sequence);
^~~~~~~~~
/target-sysroot/usr/xenomai/include/cobalt/uapi/kernel/urw.h:57:19: error:
expected ')' before 'volatile'
#define READ_ONCE ACCESS_ONCE
^~~~~~~~~~~
/target-sysroot/usr/xenomai/include/cobalt/uapi/kernel/urw.h:64:10: note: in
expansion of macro 'READ_ONCE'
token = READ_ONCE(urw->sequence);
^~~~~~~~~
This worked with Xenomai 3.1.
It looks like the issue is related to the usage of "typeof" in the ACCESS_ONCE
macro. This seems not to be allowed if you use -std option:
https://gcc.gnu.org/onlinedocs/gcc/Alternate-Keywords.html#Alternate-Keywords
I have now a workaround by defining a macro prior the inclusion of "heap.h":
#define typeof __typeof__
But I am not happy with this. Is there a way to do this better? Is -std now not
allowed with Xenomai?
Thanks,
Gunter Grau
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